Mercurial > octave-nkf
annotate scripts/statistics/distributions/fcdf.m @ 11523:fd0a3ac60b0e
update copyright notices
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Fri, 14 Jan 2011 05:47:45 -0500 |
| parents | 1740012184f9 |
| children | c792872f8942 |
| rev | line source |
|---|---|
| 11523 | 1 ## Copyright (C) 1995-2011 Kurt Hornik |
| 5410 | 2 ## |
| 3 ## This file is part of Octave. | |
| 4 ## | |
| 5 ## Octave is free software; you can redistribute it and/or modify it | |
| 6 ## under the terms of the GNU General Public License as published by | |
| 7016 | 7 ## the Free Software Foundation; either version 3 of the License, or (at |
| 8 ## your option) any later version. | |
| 5410 | 9 ## |
| 10 ## Octave is distributed in the hope that it will be useful, but | |
| 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 ## General Public License for more details. | |
| 14 ## | |
| 15 ## You should have received a copy of the GNU General Public License | |
| 7016 | 16 ## along with Octave; see the file COPYING. If not, see |
| 17 ## <http://www.gnu.org/licenses/>. | |
| 5410 | 18 |
| 19 ## -*- texinfo -*- | |
| 5411 | 20 ## @deftypefn {Function File} {} fcdf (@var{x}, @var{m}, @var{n}) |
| 5410 | 21 ## For each element of @var{x}, compute the CDF at @var{x} of the F |
| 22 ## distribution with @var{m} and @var{n} degrees of freedom, i.e., | |
|
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Grammarcheck the documentation from m-files.
Rik <octave@nomad.inbox5.com>
parents:
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23 ## PROB (F (@var{m}, @var{n}) @leq{} @var{x}). |
| 5410 | 24 ## @end deftypefn |
| 25 | |
| 5428 | 26 ## Author: KH <Kurt.Hornik@wu-wien.ac.at> |
| 5410 | 27 ## Description: CDF of the F distribution |
| 28 | |
| 5411 | 29 function cdf = fcdf (x, m, n) |
| 5410 | 30 |
| 31 if (nargin != 3) | |
| 6046 | 32 print_usage (); |
| 5410 | 33 endif |
| 34 | |
| 35 if (!isscalar (m) || !isscalar (n)) | |
| 36 [retval, x, m, n] = common_size (x, m, n); | |
| 37 if (retval > 0) | |
|
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Use uppercase for variable names in error() strings to match Info documentation. Only m-files done.
Rik <octave@nomad.inbox5.com>
parents:
10793
diff
changeset
|
38 error ("fcdf: X, M and N must be of common size or scalar"); |
| 5410 | 39 endif |
| 40 endif | |
| 41 | |
| 42 sz = size (x); | |
| 43 cdf = zeros (sz); | |
| 44 | |
| 45 k = find (!(m > 0) | !(n > 0) | isnan (x)); | |
| 46 if (any (k)) | |
| 47 cdf(k) = NaN; | |
| 48 endif | |
| 49 | |
| 50 k = find ((x == Inf) & (m > 0) & (n > 0)); | |
| 51 if (any (k)) | |
| 52 cdf(k) = 1; | |
| 53 endif | |
| 54 | |
| 55 k = find ((x > 0) & (x < Inf) & (m > 0) & (n > 0)); | |
| 56 if (any (k)) | |
| 57 if (isscalar (m) && isscalar (n)) | |
| 58 cdf(k) = 1 - betainc (1 ./ (1 + m .* x(k) ./ n), n / 2, m / 2); | |
| 59 else | |
| 60 cdf(k) = 1 - betainc (1 ./ (1 + m(k) .* x(k) ./ n(k)), n(k) / 2, | |
| 10549 | 61 m(k) / 2); |
| 5410 | 62 endif |
| 63 endif | |
| 64 | |
| 65 endfunction |